{
  "id": "astro-ph/9810163",
  "version": "v1",
  "published": "1998-10-09T20:49:22.000Z",
  "updated": "1998-10-09T20:49:22.000Z",
  "title": "CO Emission in Radio Galaxies at Low and High Redshift",
  "authors": [
    "A. S. Evans"
  ],
  "comment": "LaTex (uses PASP conference style file), 6 pages with 2 postscript and 1 gif figures, to appear in \"Highly Redshifted Radio Lines\" Symposium, Oct'97 at NRAO, Green Bank, eds. C. Carilli et al., PASP Conference Series",
  "categories": [
    "astro-ph"
  ],
  "abstract": "CO observations of 0<z<4 radio galaxies are presented. The L_CO upper limits for the high-redshift powerful radio galaxies (HzPRGs: z > 1, P_408MHz > 10^27 Watts/Hz) are consistent with no evolution in molecular gas (H_2) mass with redshift and/or radio power. Of the low-redshift powerful radio galaxies (LzPRGs: z<0.2, P_408MHz MHz > 10^23.5 W/Hz) observed, only one F-R II galaxy has been detected in CO, whereas approximately 50% of the radio-compact (FC) and F-R I galaxies have been detected. The CO and imaging data to date imply that either F-R II galaxies result from mergers of gas-poor galaxies relative to FC/F-R I galaxies, or that some FC/F-R I galaxies evolve into F-R II galaxies. In either scenario, the radio activity in powerful radio galaxies is most likely triggered by a merger event, and H_2 may be the fuel for the active galactic nucleus (AGN) in the early stages of the merger.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-10-09T20:49:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high redshift",
      "low-redshift powerful radio galaxies",
      "radio power",
      "molecular gas",
      "galaxies result"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 490578
    }
  }
}